0 calculations that you do in your mind, without writing down any numbers --
For that, they really need the grounding in literacy, literature and mathematics, especially mental arithmetic, which is the beginning of all sound learning.
For example, the use of pocket calculators make it unnecessary for children to learn the basic elements of mental arithmetic.
My mental arithmetic is pretty bad, but that is about £100 a complaint.
I am not very good at mental arithmetic, but it looks to me like one inspector to 22,500 people.
People with skills in mental arithmetic will be able to multiply that figure by 200; the answer is 4 million.
We all knew that we were not very good at mental arithmetic, and it was a jolly but rather pointless occasion.
At the outset let me make it clear that we have sought to do some mental arithmetic on how much the policy will cost.
Of the 6,600 casualties, almost half—doing some quick mental arithmetic—are children under nine.
